JPS61168772A - Vacuum heat-insulating panel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a vacuum insulation panel suitable for forming a heat insulation wall of a refrigerator, for example.

[Technical background of the invention and its problems J Conventionally, for example, the insulation wall of a refrigerator has been most commonly constructed by foaming and filling the outer box with urethane resin. During filling, carbon dioxide gas, which has a high thermal conductivity, is trapped within the urethane resin bubbles, so the insulation performance was not sufficient.

Therefore, in recent years, vacuum insulation panels have been put into practical use in order to further improve insulation performance.

That is, in this type of vacuum insulation panel, after a filling made of, for example, resin powder or granules is housed in a bag-like outer shell made of, for example, a thermoplastic resin film, the inside of the outer shell is It is evacuated and sealed airtight by welding or the like, thereby maintaining the inside of the outer shell in a vacuum state. However,
Since such conventional vacuum insulation panels are formed in a flat plate shape, for example, when applying the vacuum insulation panel to a refrigerator, that is, when installing the vacuum insulation panel inside the refrigerator outer box, the vacuum insulation panel has a flat plate shape. There is a possibility that the refrigeration cycle pipe (heat dissipation pipe, etc.) provided on the inner surface of the box will get in the way and create an unnecessary gap between the vacuum insulation panel and the outer box. For this reason, in practice, there were problems such as the need for extra efforts in the arrangement of the pipes for the refrigeration cycle, complicating the piping structure of the pipes, and impairing the ease of assembling the pipes.

[Object of the Invention] Therefore, an object of the present invention is to provide a vacuum heat insulating panel that is effective in that there is no risk of deterioration of assembly workability even when assembled into an actual device.

[Summary of the Invention] In order to achieve the above object, the present invention comprises a bag-like outer shell containing a filling made of powder or granules, and a vacuum state inside the outer shell. In the vacuum insulation panel, a concave portion for arranging a pipe shade is formed in the outer shell.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In Fig. 1, reference numeral 1 denotes a vacuum insulation panel, which is constructed by storing a filling 3 made of powder or granules in a bag-like outer shell 2 having a rectangular flat plate shape, for example. The inside of the outer shell 2 is maintained in a vacuum state. Further, on the side surface of the vacuum heat insulating panel 1, a concave portion 5 is formed in advance in a shape such that, for example, a pipe 4 for a refrigeration cycle of a refrigerator can enter therein. Incidentally, the pipe 4 is made of, for example, a condenser pipe or a dew-proof pipe attached in advance to the inner surface of the outer box 6 for the refrigerator.

Such a vacuum insulation panel 1 is manufactured through the steps shown in FIG. 2, and the manufacturing method will be described below.

That is, in the material setting step shown in FIG. 2(a), the outer shell 2 is formed into a bag shape by, for example, overlapping two rectangular thermoplastic resin films A and B and welding their peripheral edges. The material to be molded C containing the filler 3 therein is placed on the lower die 7. After this, in the pressurization and vacuum evacuation step shown in FIG. C is molded into a shape corresponding to the vacuum heat insulating panel 1, and finally the opening part CO of the material to be molded C is hermetically sealed by welding, and the inside thereof is maintained in a vacuum state. In this case, the upper die 8 is provided with a convex portion 8a having a shape corresponding to the concave portion 5, and therefore, the concave portion 5 is formed simultaneously in the pressurizing and vacuuming steps. Thereafter, a mold opening process shown in FIG. 2(C) is performed to take out the vacuum insulation panel 1.

According to the present embodiment described above, since the recess 5 for arranging the pipe 4 is provided in advance on the side surface of the vacuum heat insulation panel 1, when actually assembling this into a refrigerator, the vacuum heat insulation panel 1 is There is no possibility that an unnecessary gap will be created between the refrigerator outer box 6 and the refrigerator outer box 6 as in the conventional case. Therefore, there is no need to make any special arrangements for the arrangement of the pipes 4 (thereby, the piping structure of the pipes 4 becomes complicated and the assembling workability deteriorates accordingly).

Incidentally, the vacuum heat insulating panel 1 may be manufactured by going through various steps as shown in FIG. 3, for example, instead of using the manufacturing process shown in FIG. That is, the manufacturing means shown in FIG. 3 differs from the manufacturing means shown in FIG. 2 only in the pressurizing and vacuuming steps (see FIG. 3(b)); is a flat upper mold 8
A recess 5 of the vacuum insulation panel 1 is formed by a pipe 4 set in advance on the inner surface of the vacuum insulation panel 1. At this time, the pipe 4 is attached to the vacuum insulation panel 1 side by fitting the pipe 4 into the recess 5. Therefore, when the vacuum insulation panel 1 is manufactured in this manner, there is an advantage that the pipe 4 and the recess 5 can be precisely fitted together. In this case, as shown in FIG. 4, an aluminum foil tape 9 coated with adhesive on the back side is interposed between the vacuum insulation panel 1 and the pipe 4, and a release paper 10 is placed on the back side of the aluminum foil tape. In this case, the aluminum foil tape 9 is adhered to the inside of the refrigerator outer box 6, so that the gap between the pipe 4 and the refrigerator outer box 6 is fixed. Thermal conductivity can be improved.

Furthermore, as shown in FIG.
The pressurizing and vacuuming steps may be performed while the tube is positioned on the inner surface of the tube.

In each of the above embodiments, a heat conductive filler may be interposed between the recess 5 and the refrigerator outer box 6. Further, a reinforcing sheet such as paper may be interposed between the outer shell 2 and the pipe 4, or the outer shell 2 and the pipe 4 may be bonded together with an adhesive.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and may be modified in various ways without departing from the gist, such as a configuration in which something other than a pipe is disposed within the recess. This can be implemented by

[Effects of the Invention] As is clear from the above description, the present invention has the effect that there is no risk of deterioration of assembly workability even when it is incorporated into an actual device, and it can be applied over a wide range of areas. It is something to play.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention, with Figure 1 being a vertical cross-sectional view showing the vacuum insulation panel installed, and Figure 2 being a vertical cross-sectional view showing the vacuum insulation panel installed.
The figure is a longitudinal sectional view showing the manufacturing process of a vacuum insulation panel. 3, 4 and 5 respectively show other embodiments of the present invention, FIG. 3 is a view corresponding to FIG. 2, FIG. 4 is a longitudinal sectional view shown in an exploded state, FIG. 5 is a diagram corresponding to FIG. 2(b). In the figure, 1 is a vacuum insulation panel, 2 is an outer shell, 3 is a filling, and 4
is the pipe, 5 is the recess, 6 is the outer box for the refrigerator, 7 is the lower mold, 8
．． 8' indicates the upper mold. Applicant Toshiba Corporation 7-19, “@1 Figure 2 (a) (c) No. 31!1 (a) (b) (C)

Claims (1)

[Claims] 1. In a vacuum insulation panel that stores a filling made of powder or granules in a bag-like outer shell and maintains a vacuum state inside the outer shell, the outer shell is used for arranging pipes, etc. A vacuum insulation panel characterized by having a recess formed therein.